Transcript P25 Update ALMR

Project 25 Update
Presented by:
The
Project 25 Technology
Interest Group
http://www.project25.org
Copyright Project 25 Technology Interest Group
Presentation Agenda
• Project 25 Overview
• Wireline Interfaces
• Project 25 Work In Progress
Copyright Project 25 Technology Interest Group
Slide 2
Project 25 Overview
Copyright Project 25 Technology Interest Group
Project 25/TIA Standards Process Map
User voice
Industry voice
Joint Participation
P25 Steering
Committee
APIC: TIA-P25
Interface via MoU
TIA TR-8
Committee
P25 User
Needs
Committee
APIC
Task Groups
TR-8 Committee
Subcommittees
User Needs
Task Groups
• Define requirements for
standardization;
• Adopt or reject TIA
work
• Only Users vote
• Develops concept
documents for P25
APIC
Working Groups
• Develops user
requirements into
standards proposals
• Serves as venues for
needed clarifications
• Manages documents
• All organizations get
a vote
Subcommittee
Working Groups
• Develop consensus
standards with guidance
from APIC and users
• Only TR-8 members
vote
APIC: APCO Project 25 Interface Committee
TIA: Telecommunications Industry Association
Copyright Project 25 Technology Interest Group
Slide 4
Project 25 Proposal Process
TR8
Subcommittee
Output
Input
Process is Iterative
Proposal
submitted
to P25
Steering
Committee
P25
Steering
Committee
accepts,
rejects, or
requests
modifications
to proposal
User Needs
assists with
requirements
clarifications
Working
Document
on
proposal
developed
in
APCO
P25
Interface
Committee
or Task
Group
P25
Steering
Committee
Votes to
move
Working
Document
Forward to
TIA (TR-8)
TIA
Standard
ANSI
Standard
Requires 2/3
TIA
approval
approved.
among voting All interested
members.
parties vote.
Reviewed
Reviewed
every 5 years.
every 5
years.
ANSI
approved.
All interested
parties vote.
Reviewed
every 5
years.
TIA
Bulletin
TIA Standards can be upgraded to ANSI
Standards via ANSI/TIA processes
Copyright Project 25 Technology Interest Group
Slide 5
Project 25 Document Designation
• All Project 25 documents will carry a designation of TSB102XYYZ or
TIA102XYYZ
• Some documents are a TSB (Telecommunications System Bulletin)
• Others are TIA (Telecommunications Industry Association) Standards
• The four alpha characters following the 102 are designated:
-
-
By the left most alpha character (X)
• A Services Conventional, Trunked, Encrypted
• B Systems Interface Standards
• C Equipment Measurements and Specifications
The next 2 alpha characters (YY) designate a particular feature within a category
The last alpha character (Z) designates a particular standards document dealing
with a feature
• i.e. TIA102BACA ISSI Messages and Procedures
Copyright Project 25 Technology Interest Group
Slide 6
Benefits of Project 25 Standard
• Project 25 Standard documents define seven
specific interfaces, or connection points, of
digital wireless systems.
- Enables competing manufacturers to build products that
interoperate across those interfaces
- Enables agencies to procure interoperable Project 25
products, sub-systems, and systems from competing
manufacturers.
Copyright Project 25 Technology Interest Group
Slide 7
Project 25 System Interfaces
Subscriber Data
Peripheral
Interface
e.g. MDT
Fixed
System
Interface
(FSI)
Subscriber
Units
Data Interface
e.g. Databases
Gateway
PSTN
Telephone
Interconnect
(PSTN)
Network
Manager
Common Air
Interface
(CAI)
Repeaters
Consoles
System
P25 RF
SubSystem
(RFSS)
Inter RF
SubSystem
Interface
(ISSI)
Other P25
Systems
Copyright Project 25 Technology Interest Group
Console
SubSystem
Interface
(CSSI)
Slide 8
Project 25 RF SubSystem
The RFSS or Radio Frequency Sub-System
- is the heart of the system
- provides for processing all calls
• group, individual, PSTN
- sets up command and control messages
- routes voice and data packets
- manages subscriber (group) databases
- six of the seven standard interfaces connect to
the RFSS
Copyright Project 25 Technology Interest Group
Slide 9
Project 25 Interfaces
• Common Air Interface - CAI - (Um) –describes the
wireless/over-the-air radio access among subscriber radios and
between the subscriber radios and the fixed or base station radios
• Inter RF Subsystem Interface – ISSI - (G) – describes the
interface between systems, permitting users in one system to
communicate with users in a different system for expanded coverage.
• Fixed Station Interface – FSI - (Ef) –describes the conventional
signaling and messages between the radio system and the fixed station
by defining the voice and data packets and the command and control
messages.
• Console Subsystem Interface – CSSI - (Ec) –describes the
signaling and messages between the radio system and the console, the
position that a dispatcher or a supervisor would occupy to provide
commands and support to the personnel in the field. The trunked
console interface is part of the ISSI interface.
Copyright Project 25 Technology Interest Group
Slide 10
Project 25 Interfaces (cont.)
• Subscriber data peripheral interface (A) –describes the
data interface between the Project 25 radio and a data device
• Data network interface (Ed) – describes the data interface
between the Project 25 radio system and the external data network
including connections to computers, data networks, external data
sources, etc.
• Telephone interconnect interface (Et) – describes the
interface between the subscriber and the Public Switched
Telephone Network (PSTN) to allow field personnel to make
telephone calls. The use of this interface is dwindling due to (1) the
availability of commercial cellular networks, and (2) the potential
loading impact to the radio system if over used. (Future work)
• Network Management Interface (En) – describes the
interface to the radio system that allows administrators to control
and monitor network fault management and network performance
management. (Future work)
Copyright Project 25 Technology Interest Group
Slide 11
Common Air Interface Elements
The Common Air Interface CAI integrates and combines all other
aspects of the radio system such as Conventional & Trunking
control, Encryption, Data, and Over-The-Air-Rekeying.
Trunking
Encryption
Control Channel
Trunking Signal Blocks
Unit & Group Addressing
Multi-algorithm
Multi-key
Encrypted Voice, Data, &
Control
CAI FDMA
12.5 kHz channels
9.6 kbps
Talk Around
Conventional Signal Blocks QPSK-c modulation
FDMA channel access
Unit & Group Addressing
Error correction codes
IMBE vocoder
Conventional
Over
the Air Rekeying
OTAR
Data
IP packets
Integrated with Voice
and Control
Copyright Project 25 Technology Interest Group
Slide 12
Project 25 FDMA Air Interface
Aggregate Data Rate
• Digital voice, 4400 bits/sec
• Channel signaling, 2400 bits/sec
• Error correction, 2800 bits/sec
Composite signal, 9600 b/s
Copyright Project 25 Technology Interest Group
Slide 13
P25 Features (1) (per APCO P25 System and Standards Definition)
Conventional
Trunking
Not Applicable
Mandatory
Mandatory
Not Applicable
Group Voice Call
Standard Option
Mandatory
Individual Voice Call
Standard Option
Mandatory
Pre-programmed Data Messaging
Standard Option
Standard Option
Standard Option
Standard Option
Not Available
Standard Option
Affiliation
Standard Option
Standard Option
Call Routing
Standard Option
Standard Option
Encryption Update
Standard Option
Standard Option
Registration
Standard Option
Mandatory
Mandatory
Mandatory
Radio Unit Disable/Re-enable
Optional
Optional
Call Statistics/Traffic Recording
Optional
Optional
Teleservices
Broadcast Voice Call
Unaddressed Voice Call
Services to the Subscriber
Intra/Inter System Roaming
Call Restriction
Roaming
Copyright Project 25 Technology Interest Group
Slide 14
P25 Features (2) (per APCO P25 System and Standards Definition)
Conventional
Trunking
Encryption
Standard Option
Standard Option
Priority Call
Not Available
Standard Option
Preemptive Priority Call
Not Available
Standard Option
Call Interrupt
Standard Option
Standard Option
Voice Telephone Interconnect
Standard Option
Standard Option
Discreet Listening
Standard Option
Standard Option
Silent Emergency
Standard Option
Standard Option
Radio Unit Monitoring
Standard Option
Standard Option
Talking Party Identification
Standard Option
Standard Option
Call Alerting
Standard Option
Standard Option
Circuit Switched Unreliable/Reliable
Data
Standard Option
Standard Option
Packet Switched Unreliable/Reliable
Data
Standard Option
Standard Option
Supplementary Services
Bearer services
Copyright Project 25 Technology Interest Group
Slide 15
Project 25 “Phases”
• “Phase 1” defines digital Common Air Interface
FDMA work, using a 12.5 kHz channel
• “Phase 2” defines additional digital Interfaces,
TDMA or FDMA work, achieving 6.25 kHz
channel equivalent efficiency
• Note: Phase 2 also refers to P25 requirements
developed supporting both Phase 1 and Phase 2
systems, such as the ISSI, Fixed Station, and
Console interfaces
Copyright Project 25 Technology Interest Group
Slide 16
Wireline Interfaces
Significant Progress in 2006-7
Copyright Project 25 Technology Interest Group
ISSI, Fixed Station Subsystem Interface and
Console SubSystem Interfaces
SYSTEM 2
RFSS 1
ISSI
SYSTEM 1
HLR/VLR
RFSS 1
HLR/VLR
Additional
Conventional
Coverage Area
CSSI
Console
SubSystem
FSSI
ISSI Inter Sub System Interface
FSSI Fixed Station Subsystem Interface (conventional interface)
CSSI Console Sub System Interface
HLR Home Location Register (manages home subscribers)
VLR Visitor Location Register (manages visitor subscribers)
RFSS Radio Frequency Sub System
Copyright Project 25 Technology Interest Group
Slide 18
Wireline Interface Scope definitions
• ISSI
- Scope 1
• Trunked Talkgroup call, Unit to Unit call (Individual), Mobility
(Subscriber roaming) and Authentication
- Scope 2
• Conventional, Data, OTAR (Over The Air Rekeying), Console across
ISSI, Supplementary data (call alert, etc.)
• Fixed Station Interface
- Scope 1
• Voice & Station control for analog/P25 air interface supported over
4-wire (analog) and Ethernet (digital) transport between console and
single fixed station.
• Console Subsystem Interface
- Scope 1
• Uses the Trunked ISSI features and incorporates Conventional ISSI
features.
Copyright Project 25 Technology Interest Group
Slide 19
Wireline Standards Documentation
Compliance Assessment Plan
Overview
Messages
and
Procedures
Methods of
Measure
Performance
Conformance
Interop
testing
ISSI
Scope 1
ISSI
Scope 2
TBD
CSSI
Scope 1
CSSI
Scope 2
TBD
FSI
Scope 1
FSI
Scope 2
TBD
TIA
Published
Balloting
Developing
Copyright Project 25 Technology Interest Group
Next In
Line
Slide 20
ISSI Features
• Authentication of roaming radios
• Tracking current location of roaming radios
- subscriber database management
•
•
•
•
•
Voice transport
Project 25 addressing scheme
Unit/Group Call setup & teardown
Home-based PTT services to roaming radios
PTT communications management among
roaming and home-based radios
Copyright Project 25 Technology Interest Group
Slide 21
ISSI – Interconnecting Networks
Users from Network
A and B
communicate using
ISSI
ISSI
NETWORK A
Talk Group A
NETWORK B
The ISSI is an all-IP system interface using SIP and RTP to
achieve voice communications between Project 25 radio
networks
SIP = Session Initiation Protocol (call setup and tear down)
Project 25 Technology Interest Group
RTP = RealCopyright
Time
Transport Protocol (traffic bearer)
Slide 22
ISSI - Coverage Extension
Users from Network
A roam into B and
communicate using
ISSI
ISSI
NETWORK A
Talk Group B
Copyright Project 25 Technology Interest Group
NETWORK B
Slide 23
ISSI Agency Interoperability - Roaming
Network A user roams into
Network B and using the ISSI
communicates with Network B
users or Network A
NETWORK A
Network A user can
join talk groups with
Network B users
ISSI
NETWORK B
Network B user can join
talk groups with Network A
users or Network B
Network B users roam into
Network A and using the
ISSI communicates with
Network A users
Copyright Project 25 Technology Interest Group
Slide 24
Project 25 Activity…
Work In Progress
Copyright Project 25 Technology Interest Group
Project 25 Work In Progress
• User Requirements
- Project 25 Statement Of Requirements (SOR) updates
• Project 25 Interoperability
- Document Updates - Trunking
- Planning for Project 25 Compliance Assessment Program
• Encryption
- Document Updates - OTAR
- Inter KMF Key Sharing
• TDMA
- Air Interface
- Project 25 FDMA and TDMA Interoperability
Copyright Project 25 Technology Interest Group
Slide 26
Drivers for TDMA
• FCC - Spectral Efficiency
- 6.25 kHz efficiency ruling
• 2-slot in 12.5kHz for 6.25 kHz efficiency
• 4-slot in 25kHz for 6.25 kHz efficiency
- Additional capacity needed, particularly in urban areas
•
•
•
•
Smooth migration from FDMA to TDMA
Backwards compatibility with FDMA
TDMA coverage same as FDMA
Improved audio quality
Copyright Project 25 Technology Interest Group
Slide 27
Project 25 TDMA – Attributes
• Enhanced FDMA Control Channel
- Updates to FDMA CCH to accommodate TDMA traffic channel control and
assignment
- Controls FDMA and TDMA subscriber units
- Interoperability with FDMA for joint operations and migration
- Preservation of FDMA subscriber investments
• FDMA Conventional Direct mode
- Option for TDMA subscribers when outside of coverage area
• Two channels in 12.5 kHz or four channels in 25 kHz
- Achieves FCC 6.25 kHz channel equivalent efficiency
- Encryption interoperability (DES or AES)
• Vocoders
- Dual rate for FDMA interoperability
- Accommodate enhanced vocoders for improved voice quality
Copyright Project 25 Technology Interest Group
Slide 28
TDMA Harmonization Work in process
• 9.6 to 12 kbps air link rate for 2-slot TDMA
• Modulation
- Simulcast improvements for downlink modulation
• Dual Rate Vocoder
- Baseline Full Rate IMBE & Enhanced Half Rate IMBE
• 30 msec slot size
- Frame structures defined
• Signaling improvements
- Bidirectional for transmitting unit takeover
• 4-slot TDMA work to follow
Copyright Project 25 Technology Interest Group
Slide 29
Thank You!
PTIG Commercial Members:
Aeroflex, Inc.
BearCom Wireless Worldwide
Bechtel Corporation
Catalyst Communications Technologies
CTA Communications Consulting
Daniels Electronics Ltd.
Datron World Communications Inc.
Digital Voice Systems, Inc.
EADS Public Safety Inc.
EFJohnson Company
Etherstack Ltd.
Federal Engineering, Inc.
General Dynamics
Genesis Group
Honeywell Batteries, Global Technology Systems, Inc.
Icom America
Kenwood
Midland Radio Corporation
Motorola, Inc.
Pantel International Inc.
RELM Wireless Corporation
Tait Electronics - Radio Communications
Technisonic Industries Ltd.
Thales Communications Inc.
TMC Radio Pty Ltd
Tyco Electronics - M/A-COM
Vertex Standard, Inc.
Westel RF Technology Corporation
Wireless Pacific
Wulfsberg Electronics
Zetron, Inc.
Copyright Project 25 Technology Interest Group